Answer in brief
CVE-2024-26620 records a High severity (CVSS 8.2) vulnerability in s390/vfio-ap: always filter entire AP matrix. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=48cae940c31d2407d860d87c41d5f9871c0521db <d6b8d034b576f406af920a7bee81606c027b24c6 || >=48cae940c31d2407d860d87c41d5f9871c0521db <c69d821197611678533fb3eb784fc823b921349a || >=48cae940c31d2407d860d87c41d5f9871c0521db <cdd134d56138302976685e6c7bc4755450b3880e || >=48cae940c31d2407d860d87c41d5f9871c0521db <850fb7fa8c684a4c6bf0e4b6978f4ddcc5d43d11 | d6b8d034b576f406af920a7bee81606c027b24c6, c69d821197611678533fb3eb784fc823b921349a, cdd134d56138302976685e6c7bc4755450b3880e, 850fb7fa8c684a4c6bf0e4b6978f4ddcc5d43d11 |
| Linux/Linuxgeneric | 6.0 | Not reported |
Published upstream
Feb 29, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: always filter entire AP matrix The vfio_ap_mdev_filter_matrix function is called whenever a new adapter or domain is assigned to the mdev. The purpose of the function is to update the guest's AP configuration by filtering the matrix of adapters and domains assigned to the mdev. When an adapter or domain is assigned, only the APQNs associated with the APID of the new adapter or APQI of the new domain are inspected. If an APQN does not reference a queue device bound to the vfio_ap device driver, then it's APID will be filtered from the mdev's matrix when updating the guest's AP configuration. Inspecting only the APID of the new adapter or APQI of the new domain will result in passing AP queues through to a guest that are not bound to the vfio_ap device driver under certain circumstances. Consider the following: guest's AP configuration (all also assigned to the mdev's matrix): 14.0004 14.0005 14.0006 16.0004 16.0005 16.0006 unassign domain 4 unbind queue 16.0005 assign domain 4 When domain 4 is re-assigned, since only domain 4 will be inspected, the APQNs that will be examined will be: 14.0004 16.0004 Since both of those APQNs reference queue devices that are bound to the vfio_ap device driver, nothing will get filtered from the mdev's matrix when updating the guest's AP configuration. Consequently, queue 16.0005 will get passed through despite not being bound to the driver. This violates the linux device model requirement that a guest shall only be given access to devices bound to the device driver facilitating their pass-through. To resolve this problem, every adapter and domain assigned to the mdev will be inspected when filtering the mdev's matrix.
Quoted source text, attributed separately from HOL analysis.